Isami Aldini イサミ・アルディーニ

Isami is Takumi's brother, and the younger nephew of the owner of Trattoria Aldini. Unlike his brother, he has more of a Japanese appearance, with black hair and sharp eyes. Isami is originally shown to be overweight, with his eyes and mouth drawn in a simple fashion, although he briefly became much thinner during the Autumn Election preliminaries. Like Isami, he enrolled in Tōtsuki to hone his skills at the behest of their uncle.

Although an equally talented chef, Isami is shown to be less sophisticated than his brother. He was scolded for trying to (and failing to) revise a dish that Takumi had made during their time in the trattoria, and constantly sought to be praised for his cooking like Takumi. Though Isami is supportive of his brother, he does aim to eventually surpass him as a cook. Nonetheless, the brothers are very close.

Isami and Takumi are featured in the Shokugeki no Soma – Fratelli Aldini spinoff manga which focuses on their time in Italy before enrolling at Tōtsuki Academy.